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Article Dans Une Revue Journal of High Energy Physics Année : 2010

Light dark matter in the NMSSM: upper bounds on direct detection cross sections

Résumé

In the Next-to-Minimal Supersymmetric Standard Model, a bino-like LSP can be as light as a few GeV and satisfy WMAP constraints on the dark matter relic density in the presence of a light CP-odd Higgs scalar. We study upper bounds on the direct detection cross sections for such a light LSP in the mass range 2-20 GeV in the NMSSM, respecting all constraints from B-physics and LEP. The OPAL constraints on e^+ e^- -> \chi^0_1 \chi^0_i (i > 1) play an important role and are discussed in some detail. The resulting upper bounds on the spin-independent and spin-dependent nucleon cross sections are ~ 10^{-42} cm^{-2} and ~ 4\times 10^{-40} cm^{-2}, respectively. Hence the upper bound on the spin-independent cross section is below the DAMA and CoGeNT regions, but could be compatible with the two events observed by CDMS-II.

Dates et versions

hal-00498780 , version 1 (08-07-2010)

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Citer

Debottam Das, Ulrich Ellwanger. Light dark matter in the NMSSM: upper bounds on direct detection cross sections. Journal of High Energy Physics, 2010, 09, pp.085. ⟨10.1007/JHEP09(2010)085⟩. ⟨hal-00498780⟩
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